Mode of regulating the exhaust in locomotive-engines



THOMAS B. QUIGLEY, OF GALION, OHIO.

MODE OF REGULATING THE EXHAUST IN LOCOMOTIVE-ENGINES.

Specification of Letters Patent No. 24,661, dated July 5, 1859.

T o all whom it may concern:

Be it known that I, T. B. QUIGLEY, of Galion, in the county of Crawford and State of Ohio, have invented certain new and useful Improvements in the Mode of Regulating the Exhaust for Locomotives; and I hereby declare that the following is a full, clear, and exact descript-ion thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a side elevation of the exhaust chest, Fig, 2 a top plan view, Fig. 3 an end view and Fig. t a section of F ig. 2 in the line 1 2, showing the valve in two positions.

The letters of reference indicate the same parts in the different figures.

My improvements relate to apparatus for increasing or diminishing the draft in locomotives by regulating the area of the orifices through which the exhaust steam passes into the smoke stack, in the manner hereinafter described.

The exhaust pipes y; enter the smoke box in the usual manner. Upon the fiange n, which is cast upon the ends of the pipes I boltwhat I call a throttle exhaust. It consists of a steam tight chest which has two apertures c and cl in the bottom to correspond with the apertures in the flange ct. The chest Z), is divided longitudinally by a partition e, forming two compartments in each of which a sliding steam tight valve f and g traverses. These valves are operated by a lever 7i., keyed to one end of a rock shaft z' which has two arms 7c and Z, jointed to the ends of two rods m and n which are secured respectively to the valves f and g.

The inner sides of the boxes are inclined slightly inward at the top and the valves are ground to fit, the pressure of the steam tending to keep them tight and their form preventing them from becoming loose by wear.

The valves f and g are operated by means of a rod leading from the station of the engineer in the cab, or in any other convenient manner. An index and graduated segment may be connected with the rod to indicate the exact position of the valves. The faces of the valves f and g are also inclined slightly inward at the top as are the oppo- Y site ends of the boxes, the openings thus i formed being in the shape of a truncated pyramid.

I do not confine myself to the use of two or more valves, in some cases one might be deemed suliicient.

The draft can thus be regulated with great precision, and facility, and can be maintained when the throttle valve of the engine is nearly closed by opening the valves to the proper degree.

Upon the top of the chest Z), I place an inverted box 0, which traverses on dovetail guides or in any other steam tight manner, over the apertures c and el when required. This box has a longitudinal partition corresponding with the partition c.

In the top of each compartment are a number of apertures r the aggregate area of which is much less than that of the apertures c or (l, over'which they are placed, when they are set wide enough to supply the box with steam faster than it can readily escape through the apertures 9'. By diminishing the area of the linal exit of the steam into the smoke box, and by multiplying the apertures, the elasticity and remaining expansibility of the steam in the wider portion of the passage, serves to keep up a more continuous current than would otherwise exist.

The box o, is moved horizontally by the engineer by means of a rod s, projecting throughthe front of the smoke box.

There is no gearing of any kind about the above described exhaust apparatus or any complicated devices which are liable to get out of order by gumming up with condensed material or by being obstructed by sparks or ashes.

Having thus fully described my improvements, what I claim as my invention and desire to secure by Letters Patent is 1. The sliding throttle valves g, and f, when combined with the exhaust pipes of a locomotive engine substantially in the manner and for the purpose specified.

2. The sliding box 0 with its apertures fr, in combination with the chest o, as herein set forth.

T. B. QUIGLEY.

In the presence of- CEAS. EVERETT, W. CaossFIELD. 

